Abstract: Manual drive energy is input into a transport device of one embodiment by linearly reciprocating a first drive member that couples by way of a ratchet mechanism (or other mechanical motion rectifier means) and a mechanical motion amplifier means to one or more faster spinning flywheel masses. The one or more flywheel masses are formed in part by a combination electric motor/generator and it has rechargeable electric batteries distributively provided about a flywheel mass portion thereof. Tapered roller bearings having ferromagnetic material are interposed between the one or more flywheel masses and/or between one of the flywheels and a stationary frame of the transport device so as to repeatedly make and break closed magnetic flux conducting loops and thus provide at least one of an electric motoring and electricity generating function.

Abstract: In order to store excess kinetic energy, an energy storage device and an operating method are described, in which the kinetic energy can be partially converted into electrical energy by a first electric machine using at least two electric machines arranged on a shaft and can be partially converted into additional kinetic energy, such as rotational energy, by a second electric machine. The method for energy storage of excess kinetic energy provides for converting kinetic energy partially into electric energy and partially into additional kinetic energy, such as rotational energy.

Abstract: The invention relates to a method for positional recognition of a rotor of an electronically commutated electric machine, in particular an electric motor, in which a zero crossover of a voltage induced in a coil section of the rotor or stator is used for positional recognition. According to the invention, to determine the zero crossover the coil section is briefly powered down. A rotor/stator is used, comprising at least two coil sections, one of which has a lower inductance relative to the other one, and preferably only the coil section with the lower inductance is used for the positional recognition.

Abstract: The Harmonic Accumulation and Relative Transference of Kinetic Energy method does not transmit, but rather, transfers torque/energy from a power source to a driven system of higher rotational speed through the use of an oscillating flywheel and a potential energy storage device, for example, a torsion spring The power source adds energy to the oscillating flywheel by applying an impulse torque to the flywheel just as the flywheel begins to start rotating, and then transfers that energy to the driven system when the flywheel's speed (which may be its highest rotational speed) matches that of the driven system's rotational speed and direction. Thus, the energy is transferred when the flywheel and the driven system are at 0 rpm “relative” to each other. Accordingly, the impulse torques may be applied using principles of electric motors.

Abstract: A generator rotor torsional damper system includes a prime mover for generating rotational force, a generator stator, a generator rotor rotatably supported relative to the generator stator and configured to receive a rotational force input from the prime mover, a flywheel rotationally supported relative to the generator rotor by bearings, and an eddy current coupling operably connected between the flywheel and the generator rotor such that rotation of the generator rotor induces rotation of the flywheel in a common rotational direction through engagement by the eddy current coupling.

Abstract: Particular embodiment of the invention relates to motors that produce reaction force cancellation and are thus well suited to applications where accelerations and reaction forces are relatively large. Such motors are particularly well suited to precision machinery that can benefit from fast accelerations with short settling times. In particular, the motors include movable and counter-movable motor members, where the counter-movable motor member has a reaction mass to counter the reaction force of the first movable motor member.

Abstract: A system for generating electrical power supply signals includes at least one heat engine having a chamber that undergoes heating/cooling cycle and corresponding pressure variations. At least one piezoelectric transducer is deformed in response to the pressure variations of the heat engine. A power converter transforms the electric signals generated in response to deformation of the piezoelectric transducer(s) to a desired electrical power supply signal. The heat engine preferably uses a geothermal source of cold and an ambient source of hot or vice-versa. Hydrogen can be used as a working fluid, and metal hydride material can be used for absorbing and desorbing hydrogen during the cycle of heating and cooling of the heat engine. A phase change material can also be used. The power converter preferably includes an electromechanical battery with a flywheel storing rotational energy and possibly an electrostatic motor that adds rotational energy to the flywheel.

Abstract: Embodiments of the present invention include a shaft-less energy storage flywheel system. The shaft-less energy storage flywheel system includes a solid cylindrical flywheel having permanent motor magnets mounted about the flywheel. The shaft-less energy storage flywheel system also includes a motor stator having motor windings carrying electrical currents. The motor windings of the motor stator are aligned with the permanent motor magnets of the flywheel such that rotation of the flywheel is induced through interaction of the motor winding currents and the magnetic field of the permanent motor magnets. The flywheel provides a magnetic flux path for the permanent motor magnets. In certain embodiments, the shaft-less energy storage flywheel system includes a magnetic bearing assembly disposed directly adjacent an axial face of the flywheel. The magnetic bearing assembly controls positioning and alignment of the flywheel without physically contacting the flywheel during normal operation.

Abstract: A flywheel is described having a rotor constructed of wire wound onto a central form. The wire is prestressed, thus mitigating stresses that occur during operation. In another aspect, the flywheel incorporates a low-loss motor using electrically non-conducting permanent magnets.

Abstract: A magnetic generator, or a so-called inner-rotor generator, provided with a rotor on the inside of a stator. The rotor has a ring-shaped yoke and a magnet integrally mounted in advance to the outer circumferential surface of the yoke. The rotor is mounted to a hub spindle of a rotating body.

Abstract: Disclosed is a large capacity hollow-type flywheel energy storage device. The energy storage device includes a hollow shaft, a vacuum chamber receiving the hollow shaft, a flywheel having a predetermined weight and disposed at an inner edge of the vacuum chamber, and a hub connecting the flywheel to the hollow shaft and disposed in the vacuum chamber to be rotatable together with the flywheel. A superconductive bearing and an electromagnet bearing are disposed inside and outside the hollow shaft, respectively, such that magnetic forces thereof can be shielded from each other. Thus, magnetic interference between the superconductive bearing and the electromagnet bearing is shielded by the magnet shield interposed therebetween, thereby preventing rotation loss by stabilizing a structural mechanism during rotation while improving design adaptability.

Abstract: A motor for a treadmill, containing at least a housing (1), a stator (2), a rotor (3) having a rotating shaft (4), a front end cover (9), a rear end cover (5), and a flywheel (13). The front end cover (9) and the rear end cover (5) are disposed on both ends of the housing (1), respectively. The stator (2) and the rotor (3) are disposed in the housing (1). A front end of the rotating shaft (4) extends from the housing (1). The flywheel (13) is disposed on the front end of the rotating shaft (4). The rotating shaft (4) is connected to the flywheel (13) via key (14). A sleeve (12) is fit on the front end of the rotating shaft (4). The sleeve (12) abuts against the flywheel (13). A locking device is disposed at the end of the rotating shaft (4) and tightly fixes the flywheel (13).

Abstract: A magnetic motor generator that produces electric power by rotating a one piece magnetic floating flywheel assembly that is operated by a linear induction motor and repelled upward by a stationary natural magnet. The floating flywheel assembly magnetic axel rotates inside magnetic collar bearings, which have repelling stationary magnets to center the axel at speed. The floating flywheel assembly rotors move inside generator stators to generate electric power. The floating flywheel assembly has no physical contact with other components to prevent bearing losses at speed. A timing computer controls the operation of the linear induction motor, assesses the speed of the floating flywheel assembly and fires only when necessary to maintain rotation. The moving components are enclosed in a vacuum chamber to prevent wind resistance, or windage losses at speed. Surplus electric power can ether be stored/used by the system or used to supply a load.

Abstract: An arrangement for supplying power to a system includes a first electric drive unit constructed to supply mechanical power to or receive mechanical power from a first coupled system of machines and a second electric drive unit constructed to supply mechanical power to or receive mechanical power from a second coupled system of machines. The first and second coupled system of machines are constructed to receive mechanical power or mechanical energy or to supply mechanical power or mechanical energy. The arrangement further includes a first kinetic energy storage device having a first electrical energy exchange machine which is electrically connected to the first electric drive unit, and a second kinetic energy storage device having a second electrical energy exchange machine which is electrically connected to the second electric drive unit. The first kinetic energy storage device is coupled to the second kinetic energy storage device.

Abstract: An oscillator typically includes several rotatable drive magnets and pivotable oscillating arms having respective follower magnets so that the drive magnets drive movement of the follower magnets to pivot the arms back and forth in an oscillating manner. A generating magnet or electrically conductive member may be mounted on each oscillating arm for producing an electric current in the electrically conductive member. Repelling magnets may be mounted on the oscillating arms with respective repelling magnets positioned to repel the first repelling magnet to limit pivotal travel of the oscillating arm.

Abstract: A miniature cooling device includes numerous improvements capable of increasing the reliability and useful lifetime of the device, as well as improving electrical power to cooling power conversion efficiency. The improvements include a DC motor shaft design that incorporates a flywheel mass 314 with a solid shaft cross-section 300 for increasing shaft stiffness and magnetic flux density in the DC motor. Additional improvements include a bend resistant flexible vane 1114 in the DC motor to compression piston drive coupler, and a sealed cover set configured to be removable to make a motor repair and then replaced.

Abstract: An energy storage and generation system for an electrically powered motorized vehicle is disclosed. In one embodiment, an energy storage and generation system for an electrically powered motorized vehicle includes a stator having field coils and sensors which are provided on the inner periphery of the stator, and a rotor having permanent magnets with N and S poles arranged alternately in a circumferential direction on the outer periphery to face the field coils and housing batteries of the electrically powered motorized vehicle. The energy storage and generation system also includes a drive control unit connected to the sensors and the field coils for generating magnetic field in the field coils of the stator in response thereto to rotate the rotor. The rotation of the rotor stores rotational kinetic energy due to the dead weight of the plurality of batteries which is used to propel the electrically powered motorized vehicle.

Abstract: A servo motor with large rotor inertia includes a casing, a stator, a rotor and an inertial disk. The casing includes a hollow chamber and axial stages at front side and rear side thereof. The stator is arranged in the chamber and includes a ring and a plurality of coils around the ring. A through hole is defined at the center of the ring. A rotation shaft of the rotor is fixed to the stage and a magnet body is capped to the rotation shaft, where the magnet body is arranged in the through hole. The inertial disk is fixed to the rotation shaft of the rotor. The rotational inertia of the rotor is increased by rotating the inertial disk when the rotor is rotated by magnetize the stator. Therefore, the inertial disks of various sizes can be fixed to the rotor for matching different load inertia.

Abstract: In a magneto generator, second phase lead wires (10a, 10b) and third phase lead wires (11a, 11b) among individual one pair of first, second and third lead wires (9a, 9b; 10a, 10b; 11a, 11b) are covered with first protective tubes (12a, 12b), respectively. The second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) covered with the first protective tubes (12a, 12b) are bent toward the first phase lead wires (9a, 9b) in a circumferential direction and bundled together with the first phase lead wires (9a, 9b). The first phase lead wires (9a, 9b), the second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) thus bundled are bent in a direction opposite to the circumferential direction and covered with second protective tubes (22a, 22b, 22c), respectively.

Abstract: Energy storage device comprising a flywheel a stator arrangement and a housing. The flywheel, rotatably mounted around a rotation axis, comprises a shaft, a plurality of adjacent magnetic plates with magnetic poles, two kinetic plates, sandwiching the magnetic plates. The magnetic plates and kinetic plates are rotationally rigid with said shaft. The stator arrangement comprises a plurality of induction coils cooperating with the magnetic poles.

Abstract: A driving device for a motor 15 is disclosed, the device including an inertia wheel 16, a free wheel 18 able to ensure a unidirectional automatic clutching on a torque reversal between the inertia wheel and the shaft 12 of the motor, and a run up device 20 for the inertia wheel. The driving device is mounted on the end of shaft 12 of the motor opposite to the end for coupling the motor to mechanical equipment driven by the motor 15.

Abstract: A hybrid electric/piston driven motor may use a low voltage, high torque direct current (DC) motor to drive a vehicle, such as a motorcycle. The DC motor may be powered by a battery that may be charged by an alternator/DC generator. The alternator/DC generator may be driven by the movement of the vehicle. The motor may include springs that receive the kinetic energy of the pistons of the motor as the pistons rise in their upstroke. The springs may convert this upstroke kinetic energy to downstroke kinetic energy, minimizing the power needed from the battery.

Abstract: A low-cost minimal-loss zero-maintenance flywheel battery, to store electric power from a DC power source by conversion to kinetic energy, and regenerate electric power as needed. Its vertical spin-axis rotor assembly is supported axially by repelling annular permanent magnets, and is centered by ceramic ball bearings which have axial preload that prevents vibration and augments axial rotor support. A regenerative multi-pole permanent-magnet motor, controlled by its 2-phase stator current, and connected by power and signal conductors to power interface electronics, is integrated within the flywheel assembly, in a vacuum enclosure supported by a self-leveling structure. Sinusoidal 2-phase stator currents are controlled by high-frequency pulse-width-modulated H-bridge power electronics that draw and regenerate controlled DC current with minimal ripple, responsive to respective 2-phase rotation angle sensors, the DC power voltage, and other settings.

Abstract: Upon operation, flywheel assemblies sand other such rotational mechanisms are released by mechanical backup bearings, which then normally remain disengaged until shutdown as the flywheel assembly is levitated by the axial magnetic field. However, either due to over heating of bearings, power failure or other stimuli, flywheels often suffer a phenomenon deemed as touchdown down from the levitation state. During this touchdown event, flywheels inherently lose rotational momentum, thus ceasing to generate and release power and often cause damage to components as well as casing. Enhancements developed herein, through the introduction of the instant secondary hybrid touchdown bearing system, allow flywheels and other such systems to retain rotational momentum and continue generation of energy. Further, the instant system negates damage to system components, as well as bearing wear.

Abstract: A power source for a vehicle includes at least one toroidal ring positioned in a housing. The toroidal ring includes magnetic material such as permanent magnets. The toroidal ring is magnetically levitated in the housing. A propulsion winding is coupled with the housing and energizable via a power signal to move the toroidal ring. Once moving, the magnetic material and the propulsion winding cooperate to produce electrical power and/or provide a stabilizing effect for the vehicle. In some applications, such as in an aircraft application, two or more toroidal rings may be used and rotated at counter directions so as to produce a predetermined net angular momentum.

Abstract: Improved systems and methods to generate power using wind and controlled air movement and related structures to more cost effectively produce energy and protect system components.

Abstract: In a direct cranking electric rotary machine as an axial air-gap motor having an improved configuration mounted on a vehicle, a stator is faced to an end part on a surface of a rotor. The rotor also acts as a flywheel for an engine mounted on the vehicle. The length of a circumference of the stator is limited below 180 deg. of its entire circumference. This configuration enables a repair man to easily detach and repair components forming the direct cranking electric rotary machine.

Abstract: A motor for a treadmill, containing at least a housing (1), a stator (2), a rotor (3) having a rotating shaft (4), a front end cover (9), a rear end cover (5), and a flywheel (13). The front end cover (9) and the rear end cover (5) are disposed on both ends of the housing (1), respectively. The stator (2) and the rotor (3) are disposed in the housing (1). A front end of the rotating shaft (4) extends from the housing (1). The flywheel (13) is disposed on the front end of the rotating shaft (4). The rotating shaft (4) is connected to the flywheel (13) via key (14). A sleeve (12) is fit on the front end of the rotating shaft (4). The sleeve (12) abuts against the flywheel (13). A locking device is disposed at the end of the rotating shaft (4) and tightly fixes the flywheel (13).

Abstract: A high-torque electric motor having a rotor supported by an elongated torque arm comprising a pair of frustoconical-shaped support members. The rotor has a spherical-shaped outer surface and a complementarily shaped stator cavity. The spherical magnetic elements and the conical support members cooperate to brace the rotor against deflection along its rotational axis.

Abstract: A flywheel power supply includes a motor-generator having a polyphase stator.

Abstract: The present invention provides a magnetic wheel including a foundation body, a cover body, a fly wheel, a central axis, a drive motor, a drive gear assembly and two magnetic control strips. The drive gear assembly is driven by an output axis of the drive motor, enabling the swinging of the gear wheel of two magnetic control strips. The drive gear assembly has a gearshift unit, a coupling element and rear gear. The axial direction of the coupling element and rear gear is the same as the central axis of the magnetic wheel. The gear wheel of two magnetic control strips is mated with the rear gear through spur gear, thus making it easier to improve the manufacturing precision and drive efficiency and also reduce the manufacturing cost for better economic efficiency.

Abstract: The invention relates to a power storage system intended to transmit power to and from a driving system of a vehicle. A power storage having a stator provided with two windings and at least one rotor provided with a magnetic-flux generating device is comprised. The rotor is connected to a flywheel intended for storage of energy. The two windings of the stator are arranged for high and low voltage, respectively. The power storage is arranged to transmit power to and from the electric apparatus as well as store energy transmitted from the electric apparatus in the flywheel.

Abstract: A combined generator with built-in eddy-current magnetic resistance including a rotor and a stator iron core with generating coils winding therearound. The rotor consists of an outward turning type inertia flywheel and permanent magnets. A self-generated supply is achieved when the flywheel is driven by a fitness apparatus or a rehabilitation apparatus. An internal ring (A magnet-conductive ring) between the wheel hub and the external ring of the flywheel is extended from the internal wall toward the opening end. The internal diameter of the stator iron core is greater than the external diameter of the magnet-conductive ring such that a magnetic field gap is created. At least one receiving portion is formed in at least one portion of the internal circumference of the stator iron core for receiving at least one solenoid.

Abstract: In a rotor of a magneto generator in which permanent magnets are attached to the inner circumference of a peripheral wall of a cup-shaped formed flywheel, and a plurality of trigger poles are arranged on the outer circumference of the flywheel; the plurality of trigger poles are simultaneously punched out by press working to form a protrusion ring which is formed of a separate member from the flywheel, and the protrusion ring is integrally incorporated to the flywheel to configure the rotor.

Abstract: A hand crank generator includes a crank, a gear transmission, and a generation motor driven by the gear transmission. The crank and the gear transmission are coupled to each other. A clutch gear is coupled between the crank and the gear transmission. The crank is manually driven to further drive the gear transmission, and the generation motor is driven to generate electric current through the clutch gear. When the cranking stops, the clutch gear disengages from a motor gear disposed on the generation motor. A weighted wheel continues to revolve under inertia for a while to drive the generation motor to keep on generating electric current, so that the purpose of saving manual efforts can be achieved.

Abstract: A combination for use in supporting and rotatably driving a mass is disclosed. The combination may have a power source. The combination may also have a flywheel, which may be configured to connect with and rotatably drive the mass. The flywheel may have a flywheel end, which may have a plurality of flywheel protrusions. Additionally, the combination may have a bearing, which may be situated at least partially within the power source. The bearing may be configured to support and at least partially house the flywheel. In addition, the combination may have a crankshaft, which may be shaped to connect with and rotatably drive the flywheel. The crankshaft may have a crankshaft end, which may have a plurality of crankshaft protrusions. The plurality of crankshaft protrusions may be shaped to mesh with the plurality of flywheel protrusions.

Abstract: Electric power is stored in a flywheel assembly, from a dc power buss, and supplied to the buss, through electronics associated with a motor/generator, its rotor integral with a flywheel supported by magnetic bearings. Upon operation, the flywheel assembly is released by mechanical backup bearings which then normally remain disengaged until shutdown as the flywheel assembly is levitated by the axial magnetic field. Enhancements developed herein smooth the flux density across discontinuities or segments present in permanent magnets due to presently limited capability for manufacture of large annular magnetic members. Herein, the introduction of a medium such as a steel cylindrical member to directly interface with the rotor as opposed to the segmented permanent magnet, greatly eradicates induced eddy current and heat on the rotor. In addition, exhibited is an annularly slotted rotor which allows for greater surface area for flux absorption.

Abstract: A fastener driving tool arranged to drive fasteners into a workpiece includes at least one electric motor having a central stator and an external rotor arranged to rotate around the stator. The rotor may be in the form of a flywheel. The tool includes an energy transfer member such as a driver arranged to transfer kinetic energy from the rotor to a fastener held in the tool, thereby to drive the fastener from the tool into a workpiece. The electric motor may be a brushless motor. The tool may include two such motors, arranged such that both of their rotors propel the driver simultaneously.

Abstract: A mass magnifier is created by combining the properties of permanent magnets or electromagnets with the property of mu-metal to create a novel energy storage device. In a system mu-metal is placed in the magnetic field created by a magnet or electromagnetic in a manner to provide an energy storage device, similar to a fly wheel. The system includes a set of magnets arranged in a circle around a cylinder in a stationary position, effectively forming a stator. Another set of opposing magnets are arranged to form a rotor. When the rotor is rotated, mu-metal material is inserted between the rotor and stator magnets in a manner so that the rotor will remain in motion in a desired rotation direction, even if an opposing force is applied to the rotor axle. The system, thus, forms an energy storage device similar to a fly wheel. The system can also provide energy storage for conventional machines or for smaller micro-technology or nano-technology type devices.

Abstract: An energy storage flywheel system for a spacecraft is implemented with a fully redundant rotating group and gimbal actuator. In particular, the gimbal actuator, motor/generator, primary bearings, and secondary bearing actuator are each implemented with a pair of redundant coils or motors.

Abstract: A magneto generator can reduce the man-hours of processing and an amount of use (i.e., an amount of material) of permanent magnets used per generator. The magneto generator includes a bowl-shaped flywheel that rotates about an axis of rotation, a plurality of permanent magnets that are fixedly secured to an inner peripheral wall surface of the flywheel, a stator core that is arranged at an inner side of the permanent magnets and has a plurality of teeth protruding to a radially outer side, and magneto coils that are formed of conductors wound around the teeth, respectively. Each of the permanent magnets is composed of a plurality of magnet pieces that are formed by dividing a hexahedral magnet main body with a division surface extending in a radial direction.

Abstract: The present invention provides a flywheel power supply device which can maintain a favorable lubrication state in a bearing portion of a flywheel thus exhibiting excellent maintainability and, at the same time, effectively preventing troubles such as an energy loss attributed to a load resistance applied to the bearing portion and noises generated by a precession of the flywheel.

Abstract: A device for generating forces that are variable and controllable in amplitude, in direction, and in frequency, the device includes two unbalanced rotors (18, 20, 35 to 38) mounted coaxially in a casing (11). The device further includes electromagnetic drive elements for driving a first of the two rotors in rotation relative to the second of the two rotors, and brake elements (43 to 45) for braking the second rotor (20, 36, 38) relative to the casing.

Abstract: The present invention provides a magnetic wheel including a foundation body, a cover body, a fly wheel, a central axis, a drive motor, a drive gear assembly and two magnetic control strips. The drive gear assembly is driven by an output axis of the drive motor, enabling the swinging of the gear wheel of two magnetic control strips. The drive gear assembly has a gearshift unit, a coupling element and rear gear. The axial direction of the coupling element and rear gear is the same as the central axis of the magnetic wheel. The gear wheel of two magnetic control strips is mated with the rear gear through spur gear, thus making it easier to improve the manufacturing precision and drive efficiency and also reduce the manufacturing cost for better economic efficiency.

Abstract: Torque auxiliary units 30 are disposed at opposed positions outside rotary traces of the rotating permanent magnets 18 provided for the flywheel 11, in which permanent magnets 31 are arranged so as to be the same polarities as those of rotating permanent magnets 18 by being moved by cams 28 attached to a flywheel 11.

Abstract: A spherical flywheel is described and specified that stores rotational energy more efficiently than cylindrical flywheels. The spherical flywheel is composed of multiple layers of material with the densest material at the surface. The flywheel surface is dimpled with a pattern similar to golf ball surfaces, to minimize aerodynamic drag.

Abstract: A permanent-magnet generator is provided that has a bowl-shaped fly wheel integrally formed with a boss part by casting or hot forging, that reduces rotational imbalance and the quantity of balance correction processing such as drilling. The permanent-magnet generator has a bowl-shaped fly wheel produced by casting or hot forging, having a circumferential wall part and a bottom wall part, and having a boss part for supporting a rotating shaft, the boss part being integrally formed at the center of the bottom wall part. The plural vents are arranged substantially circularly in the bottom wall part of the fly wheel, and a key groove for coupling with the rotating shaft is provided at a part of the boss part. The arrangement of at least one of the plural vents is made unequal in order to reduce rotational imbalance including that caused by the key groove.

Abstract: A device for positioning and affixing magnets on a magnetic yoke member of an electric motor includes: a nonmagnetic support for receiving the magnets; a magnetic element for holding the magnets in position on the nonmagnetic support arranged on the other side of the nonmagnetic support with respect to the magnets, the attraction exerted by this element on the magnets greater than that exerted by the magnetic yoke member during positioning of the device with respect to the yoke; a device for varying the magnetic forces present, whereby the magnetic attraction of the magnetic yoke member and/or the magnetic element on the magnets may be varied such that the magnetic force of attraction exerted by the yoke on the magnets becomes greater than that exerted by the magnetic element on them, thus provoking transfer of the magnets to the yoke.

Abstract: Upon operation, flywheel assemblies sand other such rotational mechanisms are released by mechanical backup bearings, which then normally remain disengaged until shutdown as the flywheel assembly is levitated by the axial magnetic field. However, either due to over heating of bearings, power failure or other stimuli, flywheels often suffer a phenomenon deemed as touchdown down from the levitation state. During this touchdown event, flywheels inherently lose rotational momentum, thus ceasing to generate and release power and often cause damage to components as well as casing. Enhancements developed herein, through the introduction of the instant secondary hybrid touchdown bearing system, allow flywheels and other such systems to retain rotational momentum and continue generation of energy. Further, the instant system negates damage to system components, as well as bearing wear.

Abstract: A permanent magnet type generator includes a rotor having 4n (n is a positive integer) permanent magnet poles disposed in a circumferential direction of the rotor to have circumferential gap between adjoining poles and a stator that has 3n teeth and coils wound around the teeth. The stator core includes a pair of core end plates and a laminate core disposed between the core end plates. Each core end plate has a circumferential width that relates to the gap distance at portions opposite the permanent magnet poles.